A car runs at a constant speed on a circular track of radius 50 m , taking 31.4 seconds for every ci

Question

A car runs at a constant speed on a circular track of radius 50 m , taking 31.4 seconds for every circular lap. The average speed and average velocity for each circular lap respectively is

Professor PC Thomas Classes · Answer

(a) : Distance travelled in one rotation (lap) $=2 \pi r$ \ $	herefore \quad$ Average speed $=\frac{	ext{distance}}{	ext{time}}=\frac{2 \pi r}{t}=\frac{2 	imes 3.14 	imes 50}{31.4}=10 \mathrm{~m} \mathrm{~s}^{-1}$ \ Net displacement in one full lap $=0$ \ Average velocity $=\frac{	ext{net displacement}}{	ext{time}}=\frac{0}{t}=0$.